​It was the week before the start of the festival and I was enjoying the last couple of days of a family holiday in Edinburgh when an old friend called to ask if I wanted to join him at the Scotch Malt Whisky Society (SMWS) to celebrate his new job.

Quicker than you can say "I'll have a Bunnahabhain 11yo Pedro Ximénez Finish", I was crossing the murky Water of Leith, dashing past Martin Wishart's Michelin starred restaurant and, with a spring in my step and a flutter in my chest, making my way across the high-walled courtyard of the Vaults.

The Vaults in Leith, a building whose cavernous wine cellars are said to date back to 12th century, is home to the SMWS in Edinburgh. Grand yet snug, decadent yet clubbable, it's like stepping into an Edwardian gentleman's club (at least I imagine it is, never having done so). Membership will set you back £122 for the first year (plus an annual renewal fee thereafter), but included in the price is a welcome pack that contains 3 sample bottles of Society whisky. Members, as I was fortunate enough to discover, can also invite guests to join them for a dram. Knowledgeable and well-informed sommeliers are always on hand to make recommendations based on your personal tastes.

After what is, by all accounts, a vigorous vetting procedure shrouded in secrecy, the SMWS carefully selects its whisky directly from distillery castoffs. When a distillery produces a whisky that it doesn't want to bottle (perhaps it doesn't quite match its unique flavour criteria), rather than simply discarding the unbottled whisky, these casks are instead released to independent whisky bottlers, such as the SMWS. The SMWS Tasting Panel then gives each bottle a mischievous set of tasting notes and a quirky but descriptive name - the bottle I took home with me was called "Eureka Moment".

So as not to identify the distillery from which it originates, whiskies at SMWS are all given a unique, two-part numerical identifier. They are then bottled at cask-strength (upwards of 45%), rather than at the typical industry standard of around 40%. "Eureka Moment" came in at robust 58.6%, so a wee splash of water was necessary to fully appreciate this punchy wee dram.

All told, a visit to the Vaults in Leith is a singular, if not unique, experience.

In fact, there are an ever increasing number of independent whisky bottlers, although few can boast such sumptuous premises as the SMWS. Some, like Berry Brothers and Rudd, which has been supplying gin to the royal family since the reign of George III, and the iconic Gordon & MacPhail, which started out as a grocer in Elgin in 1895, have long histories of selecting and bottling whisky. These veterans have been joined by exciting newcomers like Hidden Spirits, an independent Italian bottler founded in 2013, Rest and Be Thankful, another bold new independent bottler that is producing some outstanding single malts and Chapter 7, which is leading the way with its clean modern branding.

These independent whisky bottlers offer high quality products often at seriously competitive prices.

So, while you're waiting for that elusive invitation to the Scotch Malt Whisky Society, why not seek out a single malt from an independent bottler?

As for me, it's nearly midnight and I've got an important deadline to meet.